![]() ![]() If things just don't work when you are developing a web application, the question immediately arises as to what data the browser and web server are actually exchanging. Leaving this up to everyone to inspect their favorite apps, cheers. then it sends all locations and searches performed in offline mode out to the wild (ouch!).app first contacts crashlytics and firebaseinstallations.I had to disable and enable wifi once at this point to get it working. Run transparent mode mitmweb -mode transparent -showhost -ssl-insecureĪnd set static IP/gateway on the phone where gateway is IP of computer running mitmproxy ![]() Ip6tables -t nat -A PREROUTING -i wlp4s0 -p tcp -dport 443 -j REDIRECT -to-port 8080 Ip6tables -t nat -A PREROUTING -i wlp4s0 -p tcp -dport 80 -j REDIRECT -to-port 8080 Iptables -t nat -A PREROUTING -i wlp4s0 -p tcp -dport 443 -j REDIRECT -to-port 8080 ![]() Make sure system forwards packets sysctl -w _forward=1ĭisable redirects sysctl -w .send_redirects=0Īnd set redirect to proxy iptables -t nat -A PREROUTING -i wlp4s0 -p tcp -dport 80 -j REDIRECT -to-port 8080 mido:/ # chmod 644 /system/etc/security/cacerts/c8750f0d.0Īfter reboot verify mitmproxy certficate is part of systemįor Android proxy to work transparent mode is required let's make few adjustments Then move certificate to the system storage mido:/ # mv /sdcard/c8750f0d.0 /system/etc/security/cacerts/Ĭhange ownership and reboot phone. Start remote shell on the phone # adb shell # adb push /home/mahdi/Downloads/c8750f0d.0 /sdcard/ $ openssl x509 -inform PEM -subject_hash_old -in mitmproxy-ca-cert.pem | head -1Īnd change the filename $ mv cacert.pem c8750f0d.0Ĭonnect Android phone using ADB and push certificate to the device # adb root $ openssl x509 -inform PEM -in mitmproxy.crt -out cacert.pemĬalculate the hash as Android has very obscure security measure that system certificate file name must match the hash (I mean wtf?). Let's prepare certificate to suit Android security model, go and download mitmproxy-ca-cert.pem or mitmproxy.crt.įollowing step is needed only for mitmproxy.crt to convert it into PEM. altering all occurences of 'Brno' with 'Krno' mitmproxy -replacements :~s:Brno:KrnoĮt voila! search results show Krno and connection is still secure.Īndroid part ain't that easy especially for applications which are using certificate pinning. Let's demonstrate how trivial it is to manipulate the traffic. One can now inspect all the data that go in/out. Pointing the browser to (or in console) reveals all the traffic Simply typed 'Brn' to reveal some results ![]() Once done all traffic should be decrypted, let's try couple of things, first inspect search function of site If you see this instead then proxy is not configured correctly Proxy server listening at in the browser change settings proxy to įor the first time it's necessary to inject valid certificate authority, point browser to and install certificate as per instructions on the page Browserĭecrypting SSL traffic in browser is extremely simple, just run either console version $ mitmproxy I will focus both on web browser as well as android app analysis. Mitmproxy - is great tool to analyze traffic. ![]()
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